Optional

Create the file config/paperclipdropbox.yml:

development:
dropbox_key: dropbox_developer_key <--- This are not required unless you are modding the gem
dropbox_secret: dropbox_developer_secret <--- This are not required unless you are modding the gem
path: "/:attachment/:attachment/:id/:style/:filename"
test:
...
production:
...

You can add the path option to the config/paperclipdropbox.yml file for
ease of use.